1981417172 has 24 divisors (see below), whose sum is σ = 3966158784. Its totient is φ = 848466432.

The previous prime is 1981417171. The next prime is 1981417181. The reversal of 1981417172 is 2717141891.

It is a super-3 number, since 3×1981417172³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1981417171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5003 + ... + 63149.

It is an arithmetic number, because the mean of its divisors is an integer number (165256616).

Almost surely, 2^1981417172 is an apocalyptic number.

It is an amenable number.

1981417172 is an abundant number, since it is smaller than the sum of its proper divisors (1984741612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1981417172 is a wasteful number, since it uses less digits than its factorization.

1981417172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59375 (or 59373 counting only the distinct ones).

The product of its digits is 28224, while the sum is 41.

The square root of 1981417172 is about 44513.1123602922. The cubic root of 1981417172 is about 1256.0067522660.

The spelling of 1981417172 in words is "one billion, nine hundred eighty-one million, four hundred seventeen thousand, one hundred seventy-two".